Abstract: Provided is a motor control device that includes a controller outputting a PWM control signal for controlling a multiphase electric motor, a driving signal generator generating a switching element driving signal for driving the multiphase electric motor according to the PWM control signal output from the controller, and a bridge circuit configured of a plurality of semiconductor switching elements switching a current flowing through the multiphase electric motor according to the switching element driving signal generated by the driving signal generator. The controller is provided on a first board. The driving signal generator and the bridge circuit are provided on a second board and are connected by wiring provided on the second board. The first board and the second board are connected by a predetermined inter-board connecting line. The controller outputs the PWM control signal to the driving signal generator through the predetermined inter-board connecting line.

Abstract: A shift range switching control device for switching a shift range by controlling driving of a motor includes a feedback control section, a stationary phase energization control section, and a switching control section. The feedback control section performs a feedback control based on an actual angle of the motor, and a motor speed. The stationary phase energization control section performs a stationary phase energization control which energizes a stationary phase selected according to the actual angle. The switching control section switches the control state of the motor.

Abstract: A power supply device includes connector from a power source, a rectifying module, a power supply module, and a bulk capacitor. The capacitor stores and smoothes the rectified power, and outputs the smoothed power to the power supply module. The connector is capable of connecting to the power source through a Delta connection and a Wye connection.

Abstract: A motor-drive system may include a rectifier, a metal-oxide varistor (MOV) assembly, and an inverter. The rectifier may generate a direct current (DC) voltage based on a first voltage received from at least one supply voltage line coupled to a voltage source. The MOV assembly may include at least two metal-oxide varistors (MOVs) respectively coupled to the at least one supply voltage lines. The MOV assembly may couple between the voltage source and the rectifier. The motor-drive system may also include a permanently-installed jumper to couple at least one MOV of the at least two MOVs of the MOV assembly to a system ground. The inverter of the motor-drive system may convert the DC voltage to an alternating current (AC) voltage, which may be provided to a load of the motor-drive system.

Abstract: According to one embodiment, a controller of a stepping motor includes a table generating unit and a current controlling unit. The table generating unit generates a data table of a threshold by using values of induced voltage at frequencies of switching signal that changes a set value of a drive current, the threshold being proportional to a frequency of the switching signal within an operation region in which the frequency of the switching signal is lower than a predetermined frequency, the values of the induced voltage including a first induced voltage generated at a first frequency of the switching signal and a second induced voltage generated at a second frequency of the switching signal. The current controlling unit controls a value of the drive current in accordance with a comparison result between the threshold and an induced voltage that is detected at a frequency lower than the predetermined frequency.

Abstract: A motive power transmission adapter includes a casing and at least one power transmission portion. The casing is disposed between a surgical tool and a power unit for driving the surgical tool. In addition, the casing includes a clean surface which is a surface facing the surgical tool disposed in a clean region and an unclean surface which is a surface facing the power unit disposed in an unclean region. At least one power transmission portion is movable relative to the casing and transmits a movement of the drive portion to the driven portion. In addition, at least one power transmission portion is disposed to be movable in a direction in which the clean surface and the unclean surface extend and is disposed between the drive portion and the driven portion in a direction intersecting a linear motion direction of the drive portion.

Abstract: A specialized variable speed drive of the present invention is capable of controlling a motor and increasing the efficiency of both an ACIM or DCBL motor by biasing operation in favor of a class AB mode. The variable speed drive may be configured with two gate drivers where one gate driver is a class D gate driver and the second gate driver is either a class AB gate driver or a class C gate driver. The system also operates to reduce electro-magnetic interference in the operation of motors while increasing the reliability of the overall VSD system.

Abstract: A system for simultaneously controlling a plurality of PM AC motors includes a single VFD operatively connected to a power source. The single VFD is programmable to have predetermined operating conditions. The plurality of PM AC motors is operatively connected to the single VFD. Each PM AC motor is free of a built-in VFD. Each PM AC motor is operated in accordance with the operating conditions of the single VFD.

Abstract: An apparatus for storing energy comprises a two-quadrant chopper connectable to a converter DC link, at least one energy store, connected to the two-quadrant chopper for storing energy, so that the two-quadrant chopper can be used to transport energy from the converter DC link to the at least one energy store or vice versa. The apparatus further comprises a control device for controlling a current flowing in accordance with the transport of the energy, wherein the control device is configured to control the current flowing in accordance with the transport on the basis of a thermal load on the at least one energy store.

Abstract: A service robot includes a robot body, a main post vertically mounted on the robot body, and at least one service unit provided on the main post to be movable vertically and to be rotatable, and including a service tool. The service unit includes a main plate that is disposed in an inner space of the main post, and a mounting member that is provided to be rotatable along an outer circumferential surface of the main post, and coupled to the main plate. The service tool is mounted on the mounting member, a vertical driving device is disposed in the inner space of the main post to move the main plate vertically, and a rotation driving device is installed on the main plate to rotate the mounting member.

Abstract: A motor driving device includes an OPEN driving mode in which a driving waveform is generated without using detection information of a rotational position of a rotor and the rotor is rotated, and a CLOSE driving mode in which a phase of a rotational position and a phase of a driving waveform are synchronized using the detection information of the rotational position of the rotor, a desired phase difference is set between the rotational position and the driving waveform, and the rotor is rotated. The CPU controls rotation of the rotor using the OPEN driving mode, instructs a driving waveform generating circuit to set a phase difference for generating a torque in a reversing direction when rotation of the rotor is reversed, switches to the CLOSE driving mode, and then switches to the OPEN driving mode again when reversing has been completed.

Abstract: A power tool is provided including a brushless DC (BLDC) motor, a rectifier that receives an alternative current from a power supply and outputs a rectified signal supplied to a DC power bus, and an inverter circuit having motor switches connected electrically between the DC power bus and the motor. A control module controls a switching operation of the power switches to regulate supply power from the power supply to the motor. The control module controls the switching operation so as to, within a half cycle of the AC power supply voltage waveform, increase current draw from the power supply from a first threshold at or after a first zero-crossing of the half cycle up to a second threshold, and reduce current draw from the power supply from the second threshold up to a third threshold at or prior to a second zero-crossing of the half cycle.

Abstract: A compact motor control system for selectively controlling power from a power source to a load includes a motor switching assembly having a solid state contactor with a plurality of solid state switches. The motor switching assembly also includes at least one direct current (DC) link coupled to the solid state contactor and redundant first and second inverters coupled to the at least one DC link. The motor switching assembly further includes a first relay coupled between the solid state contactor and an input of the inverter and a second relay coupled between the solid state contactor and an input of the second inverter. In addition, the motor control system includes a control system programmed to control the motor switching assembly to selectively supply power to the load from the power source.

Abstract: Modulated pulse control of electric machines to deliver a desired output in a more energy efficient manner by either (a) operating the electric machine in a continuous mode when a requested torque demand is greater than the peak efficiency torque of the electric machine or (b) in a pulsed modulation mode when the requested torque demand is less than the peak efficiency torque of the electric machine. When operating in the pulsed modulation mode, the inverter may be deactivated to further improve the system efficiency when field weakening is not required to mitigate or eliminate generation of a retarding torque in situations when Back Electromagnetic Force (BEMF) exceeds a supply voltage for the inverter of the machine.

Abstract: A motor control apparatus includes: an excitation unit configured to excite a plurality of excitation phases of each of a plurality of motors that include first to Nth motors and a control unit configured to control the excitation unit so as to perform detection excitation processing for sequentially exciting the plurality of excitation phases for each excitation cycle during each excitation period, regarding each of the first to Nth motors, and thereby detect rotor positions of the respective first to Nth motors. When detecting rotor positions of the respective first to Nth motors, the control unit delays a start timing of the detection excitation processing of at least one motor out of the first to Nth motors relative to a start timing of the detection excitation processing of another motor by a period shorter than the excitation period.

Abstract: A movement includes a driver having ON and OFF states, and outputting a drive signal to a coil of a motor, a lower limit detector detecting that a current flowing through the coil is less than a lower limit, a drive controller bringing the driver into the ON state based on a result of the lower limit detector, and bringing the driver into the OFF state based on an elapsed time from the ON state, a polarity switcher switching a polarity of the drive signal when an elapsed time from the OFF state of the driver satisfies a switching condition, and a drive stopper stopping driving of the driver when the OFF time satisfies a stopping condition.

Abstract: A motor drive controller is provided that includes a current source inverter. The current source inverter includes driver circuitry configured to generate switching commands; a variable current source configured to generate a variable current that regulates power in a motor; and motor commutation circuitry configured to receive the variable current and switching commands, and to commutate phase currents that are output to the motor.

Abstract: A motor control system includes a motor switching assembly comprising a power converter positioned on a converter path, a first relay positioned on the converter path upstream of the power converter, a second relay positioned on a bypass path that is in parallel with the converter path, and a solid-state switching unit positioned upstream from the converter path and the bypass path. The motor control system also includes a control system that controls operation of the motor switching assembly, with the control system programmed to operate the solid-state switching unit in one of a conducting mode, a non-conducting mode, and a ramping mode, so as to selectively control and condition power flow therethrough. The control system is also programmed to control switching of the first and second relays between open and closed positions to selectively route power along the converter path or the bypass path.

Abstract: An apparatus for starting operation of a motor of an implantable blood pump including a memory storing one or more default parameters for at least one of controlling and monitoring the startup operation. A processor operatively coupled to the motor is included, the processor is configured to: commence the startup operation based on the one or more default parameters; detect an error during the startup operation; adjust at least one of the one or more default parameters in response to the detected error; store the at least one adjusted parameter in the memory; and commence subsequent startup operations based at least in part on the at least one adjusted parameter.

Abstract: A propulsion system having an electric motor and corresponding method. A controller is configured to receive a torque request and selectively command the electric motor. The controller has a processor and tangible, non-transitory memory on which instructions are recorded for a method of generating an auxiliary power. The controller is configured to obtain a desired auxiliary power and a delta factor (?). The delta factor is set as a speed modifier (??=?) when the cosine of an angle (?), between a constant torque unit vector and a decreasing voltage ellipse unit vector, is less than a predefined threshold. A modified rotor speed is obtained as a sum of an original rotor speed and a speed modifier (??). The controller is configured to obtain modified stator current commands based on the modified rotor speed and torque request. The auxiliary power is generated by commanding the modified stator current commands.